EP 0735672 B1 20021127 - Dual surface acoustic wave transducer for dual filter, in particular for television receivers
Title (en)
Dual surface acoustic wave transducer for dual filter, in particular for television receivers
Title (de)
Oberflächenwellen-Doppelwandler für ein Doppelfilter, insbesondere für Fernsehempfangsgeräte
Title (fr)
Transducteur double à ondes acoustiques de surface pour filtre double, notamment pour récepteurs de télévision
Publication
Application
Priority
DE 19512251 A 19950331
Abstract (en)
[origin: EP0735672A2] The surface wave convertor has an interdigital structure of piezoelectric material (1). This structure has components (31,32,32') with convertor fingers which have partial interdigital overlapping. A part structure of a first component (31) has known interdigital overlapping (61) between two first ranges (b,c/b',c'). At least one other component (32,32') has finger overlappings (62,63;62',63') of these first ranges with convertor fingers of another range (a;a'). This other range (a;a') can be positioned to the side, between the two first ranges (b,b'/c,c). At least one further range (d;e) with convertor fingers, is positioned to the side of one of the first ranges and has interdigital finger overlapping (42,43) with these fingers.
IPC 1-7
IPC 8 full level
H03H 9/145 (2006.01); H03H 9/00 (2006.01); H03H 9/64 (2006.01); H03H 9/72 (2006.01); H04N 5/44 (2011.01)
CPC (source: EP KR US)
H03H 9/1452 (2013.01 - EP US); H03H 9/64 (2013.01 - KR); H03H 9/6426 (2013.01 - EP US); H03H 9/72 (2013.01 - EP US); H04N 5/44 (2013.01 - EP US); H03H 2250/00 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
EP 0735672 A2 19961002; EP 0735672 A3 19970205; EP 0735672 B1 20021127; CA 2173055 A1 19961001; DE 19512251 A1 19961010; DE 19512251 C2 19970403; DE 59609896 D1 20030109; JP 3806178 B2 20060809; JP H08288784 A 19961101; KR 100425398 B1 20040616; KR 960036297 A 19961028; US 5867075 A 19990202
DOCDB simple family (application)
EP 96104184 A 19960315; CA 2173055 A 19960329; DE 19512251 A 19950331; DE 59609896 T 19960315; JP 10338996 A 19960329; KR 19960008694 A 19960328; US 62777396 A 19960401